package com.wdl.fm.common.utils;

import org.springframework.beans.BeansException;
import org.springframework.beans.FatalBeanException;
import org.springframework.util.Assert;

import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;

/**
 * 自定义BeanUtil
 * @author Harry Tian
 *
 */
public abstract class BeanUtil extends org.springframework.beans.BeanUtils {  
    
    public static void copyProperties(Object source, Object target) throws BeansException {
      Assert.notNull(source, "Source must not be null");
      Assert.notNull(target, "Target must not be null");
      Class<?> actualEditable = target.getClass();  
      PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);  
      for (PropertyDescriptor targetPd : targetPds) {  
        if (targetPd.getWriteMethod() != null) {  
          PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());  
          if (sourcePd != null && sourcePd.getReadMethod() != null) {  
            try {  
              Method readMethod = sourcePd.getReadMethod();  
              if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {  
                readMethod.setAccessible(true);  
              }  
              Object value = readMethod.invoke(source);  
              // 这里判断以下value是否为空 当然这里也能进行一些特殊要求的处理 例如绑定时格式转换等等  
              if (value != null) {  
                Method writeMethod = targetPd.getWriteMethod();  
                if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {  
                  writeMethod.setAccessible(true);  
                }  
                writeMethod.invoke(target, value);  
              }  
            } catch (Throwable ex) {  
              throw new FatalBeanException("Could not copy properties from source to target", ex);
            }  
          }  
        }  
      }  
    }  
  }  